BATGIRL ANNUAL #1 (2017)
Batgirl and Supergirl must team up to break into Arkham Asylum! In this all-new Rebirth annual Batgirl must seek Supergirl's help to solve a mystery that leads them to the heart of the most insane insane asylum there is! But what they discover - and who they discover - in Arkham will lead to a much, much bigger story!
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